VGY single-chip microcomputer adopts VLSI technology to integrate data processing capabilities of central processing unit CPU, random access memory RAM, read-only memory ROM, various I/O ports and interrupt systems, timer/counter and other functions (may also include display Drive circuit, pulse width modulation circuit, analog multiplexer, A/D converter and other circuits) are integrated into a small and complete microcomputer system on a silicon chip, which is widely used in the field of industrial control.